How old is someone named Jack?
The average Jack is 34 years old.
Half of all living Jacks are between 12 and 61. The average sits between a large young group and an older one, so many Jacks are much younger than 34.
When was Jack popular?
Great-grandmother name, or brand-new favorite? Both. Jack peaked around 1929, fell out of fashion, and is popular again today.
Popular names of 1927 · The most popular names of the 1920s →
Show the numbers by decade
| Born in | Babies born | Alive today |
|---|---|---|
| 1900s | 9,269 | 0 |
| 1910s | 49,837 | 0 |
| 1920s | 116,741 | 730 |
| 1930s | 96,873 | 11,000 |
| 1940s | 74,129 | 32,000 |
| 1950s | 62,535 | 41,000 |
| 1960s | 35,740 | 29,000 |
| 1970s | 18,694 | 17,000 |
| 1980s | 16,060 | 15,000 |
| 1990s | 37,561 | 36,000 |
| 2000s | 95,661 | 94,000 |
| 2010s | 85,781 | 85,000 |
| 2020s | 53,448 | 53,000 |
How many Jacks are still alive?
About 410,000 Jacks are alive in the US today. That's 54% of the roughly 760,000 babies named Jack since 1880.
Roughly half of all Jacks ever born are still living.
What generation is the name Jack?
About one in three living Jacks are in Gen Z, born between 1997 and 2012.
Is Jack an old name?
Somewhat. Jack is older than 58 in 100 names on AgeByName, but younger than plenty of classics.
Looking ahead: if babies keep getting the name at today's pace, the typical Jack will be 33 in 2056, about the same as today.
Is Jack a boy or girl name?
Almost entirely boys: 99.7% of living Jacks are men.
Names the same age as Jack
NAME TWIN
Jack's name twin is Maryjane. Of all 3,713 names on AgeByName, Maryjane's age curve is the closest match to Jack's: 90% alike.
Compare: John vs. Jack
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Questions about the name Jack
How old is the average Jack?
The average Jack in the US is 34 years old. The median is 23, so half are older and half younger.
How many people are named Jack?
About 410,000 Jacks are alive in the US today, out of roughly 760,000 babies given the name since 1880.
When was the name Jack most popular?
In 1927, when about 13,000 baby boys were named Jack.
Is Jack a Gen Z name?
Partly. Gen Z are the largest group, about 33% of living Jacks, but the name spans several generations.
Estimates from Social Security Administration baby-name records (births 1880–2025) and SSA cohort life tables (2026 Trustees Report). Updated each spring. How we calculate this